Centralizer



FIG. 1 is a side elevation view of a centralizer, showing our new design;

FIG. 2 is an axial end, elevation view of the centralizer.

FIG. 3 is a perspective view of the centralizer, with unclaimed environment not shown.

FIG. 4 is an axial end, elevation view of the centralizer, with unclaimed environment not shown; and,

FIG. 5 is a side elevation view of the centralizer.

The broken lines in the drawings depict unclaimed environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a centralizer, as shown and described. 